hexa·he·dron /ˌhɛksəˈhidrən/
  六面體
  Hex·a·he·dron n.; pl. E. Hexahedrons L. Hexahedra   Geom. A solid body of six sides or faces.
  Regular hexahedron, a hexagon having six equal squares for its sides; a cube.
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  hexahedron
       n : any polyhedron having six plane faces